Slack Senior Software Developer interview questions

The interview takes far too long at between 8 to 13 hours to complete. This is disrespectful to applicants and is the reason I withdrew my application once I had another offer. First is a 1 hour phone screen with the recruiter. It's called a phone screen but they come with questions from the hiring manager, so it's basically a light interview. You can be cancelled from the process here. Then there is a 1 hour interview with the hiring manager. Then there is a 2 - 6 hour take home assignment. The time to complete varies on what assignment you get, how proficient you are in the given languages, etc. Then there is a 4.5 hour in person assessment. There is no need for interviews to be so long. Interviews with Amazon and Google only take 6 hours and are heavily criticized for being too long. There is no reason to have an interview process longer then Amazon and Google.

I applied through Linkedin and got a response from Recruiter. We had initial call and recruiter asked me to submit my availability for technical interview. I submitted my availability but never heard back from a recruiter. Followed up several times for 3 weeks but never received any response. For last follow up email I received automated response stating the email address doesn’t exist. Apparently the recruiter left the organisation and my candidature was lost during handover. I tried reaching out to another recruiter on Linkedin but my request was declined. So, my impression - is they don’t value the candidates and if they can’t value the candidates I doubt they value their employees.